Table 1-2. Led Descriptions; Figure 1-2. Front Panel Of The Model Xm128 Modem (With U Interface) - NETGEAR XM128 ISDN Reference Manual

Reference Guide for the Model XM128 ISDN Digital Modem
1
U
INTERFACE
ISDN
Digital Modem
128Kpbs
PWR
Key:
1 = PWR (power) LED
2 = ISDN LEDs
3 = RS-232 COM LEDs
4 = PHONE 1 and PHONE 2 LEDs
Figure 1-2. Front panel of the Model XM128 modem (with U interface)
LEDs on the front panel of the Model XM128 modem allow you to monitor and diagnose the
device. Table 1-2 describes each LED.
Table 1-2. LED descriptions
Label Color
PWR Yellow
(Power)
ISDN LEDs:
D Green
B1
B2
AA
CP
1-4
2
D B1 B2 AA CP DTR DSR RTS
ISDN
Activity Description
On Power is supplied to the modem.
On The ISDN link on the D channel is active.
Blinking The modem is attempting to make a connection to the switch.
On A connection is established to the B1 channel.
On A connection is established to the B2 channel.
On The Model XM128 modem is in the automatic answering mode.
Blinking An incoming call is ringing.
On Compression is active on either of the B channels.
3 4
MODEL XM128
CTS TD RD
1 2
COM
7847MEA
Introduction